Statistical Mechanics of Adsorption. V. Thermodynamics and Heat of Adsorption

Abstract

The thermodynamics of an adsorbate on an inert adsorbent is discussed in some detail. Heats of adsorption are given particular attention in an attempt to clarify and extend the available methods in this field. It is found that the true equilibrium ΔH=TΔS of adsorption for adsorbate molecules is given by $$\mathrm{(\partial }\ln {\mathrm{p/\partial T)}}_{\mathrm{[open\; phi]}}{\mathrm{=-\Delta H/RT}}^2,$$ where [open phi] is the two‐dimensional spreading pressure. The relation of the work of Rowley and Innes to the present paper is considered.